Mechanical movement.



No. 893,258. 4 PATENTBDJULY 14, 1908.

T.H.MILL S. MECHANICAL MOVEMENT.

' L PIfLIOATION FILED JUNE 21.1907.

2 SHEETS-SHEET 1.

I TTORIIEY.

PATENTED JULY 14; 1908.

F. H. :MILLS. MECHANICAL MOVEMENT.

.APPLICATION FILED JUNE 27, 1907 2 SHEETS-SHEET 2.

mmrron A TTOIHIEY,

" UNITED STATES PATENT OFFICE.

FRANK H. MILLS, OF CAMDEN, NEW JERSEY.

MECHANICAL MOVEMENT.

Specification of Letters Patent.-

Patented July 14, 1908.

Original. application filed December 23, 1903,- Serial N 0. 186,287. Iiivided and this application flied June 27, 1907.

- Serial No. 380,999.

To all whom it may concern:

Be it known that I, FRANK H. MILLS, a citizen of the United States, residing at Camden, 1n the State of New Jersey, have invented.a

certain new and useful Mechanical Move the accompanying drawings, forminga part of this specification.

My lnventlon. consists of a new embodiment of a mechanical movement operatlng to directly rotate a power-transmitting sleeve or tubular shaft, rotatably supported, by

' means of an alining shaft reciprocated within said sleeve; and while it may be employed for several distinct purposes, it is'particularly designed for application to a motor engine operated by steam or other motive fluid, for

directly converting the motion of a reciproeating piston rod and its adjunctive parts, of

such an engine, into rotary motion as a functional substituted for the ordinary crankmechanism, and for imparting such motion, through the instrumentality of suitable power-transmitting devices to belting, 'shaft-.

ing or otherwise. Suchan engine is shown and described in an application for patent filed by me, December 23, 1903, Serial No. 186,287, of which the presentiapplication is a division.

. To these ends my invention consists of the elements and the combination of them hereinafter described, and constituting such novel embodiment of the aforesaid mechanical movement; the distinctively novel features elementally and in the combination of them hereinafter recited, being-pointed out in the appended claims. I I

In the drawings'illustrating my invention: Figures 1 and 2 are top plan views illustrating my'invention applied to the piston rod of a reciprocating engine, Fig. 1 showing the position of the parts when the piston is at tor engine of the ordinary reciprocating type,

in which, as shown in Figs. 1 and2 of the drawings, 5 represents the reciprocating piston itu inally ar hereinafter mentioned.

ing in guides 9, 9, and 12 is an extension of the piston rod in the form of a projecting cylindrical-piston shaft which-is operatively guided, as well as supported against rotation, by being rigidly connected to the cross head; which latter element also operates as an in-' terposed barrier against rearward transmission of torsional strain. The said shaft 1.2 carlies the cam-pin or stud 15 hereinafter described.

Power-transmitting devices are shown in.

the form of a cog-gearing 13 mounted on the power-sleeve D and also a/ power-shaft .1

which is rotatably supported upon the engine frame, in aline ment with the piston shaft 12, and directly rotated thereby through the medium of the elements constituting my new mechanical movement and which I will now describe.

Referring to Figs. 3 and 4, is shown a tubular shaft or sleeve D on therearward end of which is rigidly secured. the aforesaid cog-' gearing 13 and power transmitting shaft. This sleeve is provided with a reversely-set spiral cam-groove '14. As the groove ex- .tends throughout the complete periphery of the tubular sleeve, severing it in two parts .7, 7, these are secured together bya pair of oppositely-disposed connecting brackets 8, 8. The walls 6 of the cam groove are inwardly inclined, for the purpose hereinafter stated. essential characteristic of the cam-groove is that it consists of. a pair of' ooves of like character, the apex'iof each metrically opposlte sides of the periphery of the sleeve and near each end thereof, and extending thence, in a curve, towards the longitudinal center of the sleeve, the ends of the two grooves, being reversely set, thus meeting and forming a'double spiral cam groove. The co-acting element is acamshaft 12 of a diameter fitting the-interior of eing on diathe tubular shaft or sleeve D, adapted to reciprocate freely therein, and carrying a cam in or stud 15, which is adjustable lonto adjust the friction ringor col- Means are provided to compensate for Wear in the cam-grooved'sleeve, consisting ofa ring 15, which is tapered to conform to the angle'of inclination of. the cam-grboves in the ower-sleeve, and is mounted loosely sleeveike on the cam-pin 15and rotatable ,thereon and therefore lnterposedand rotatable'between the cam-pin 15 and the walls of the spiral groove 14 in the sleeve D. This rotatable ring operating as a collar reduces .friction and at same time compensates for wear, as the walls of the spiral groove in the sleeve are preferably made with a slight incline towards the base in order that any. wear may be taken-up by screwing down the cam-pin 15, carrying the rotatable friction ing drawings of one-half actual size of the various parts, for an engine with a cylinderpiston having a four-inch stroke, measured om the center of the actuating pin, in Fig.

' 4, to the opposite center of the double spiral cam-groove; this figure showing in solid lines the actuating stud at the apex of one section of the spiral groove, on one side, and in dotted lines the relative position of the oppositely-disposed, portion of the double spiral groove, on the opposite side ofthe periphery of the'sleeve; While in Fig.- 3 is shown a side elevation of the same parts, on

a quarter turn of the sleeve on the actuating pin, and showing also the correct curvature of each half of the reversely-set s iral camgroove and of the incline of the wa ls thereof. The operation is illustrated by reference to v Fig. 4, showing a full inward stroke of the piston (which is also that represented in Fig.

1), from which it will be seen that the camstud has caused the cam-grooved sleeve to make exactly a half revolution, which in turn has rotated the power shaft and the gearing;

While the return or full outward stroke .(shown in Fig. 2,) has caused another half revolution of the sleeve and power-shaft; so

that each full reciprocation of the piston causes a full revolution of the sleeve and power shaft;

The constru'ctiveprinciples ofmy invention can be embodied in an engine for either stationary or marine purposes, or for light Work such as in automobiles.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: I

1. Mechanismforimparting a continuous rotary motion in either direction, said mechanism comprising a cam-sleeve composed of two sections united peripherally, with a reversely-set spiral cam-groove formed between their coinciding faces, in combination with a reciprocating shaft, a cam-stud on its periphery adapted to engage with the camgrooves in said sleeve, and with means to support said shaft and cam sleeve in operative alinement.

2. Mechanism for imparting a continuous rotary motion in either direction, said mechanism comprising a sleeve composed of two sections, united peripherally in spaced relation and so shaped in respect to their contiguous and coinciding faces as to form between them a reversely-set double spiral camgroove with inwardly tapering walls, in combination with a reciprocating shaft, a tapering cam stud on its periphery and operatively engaging said inclined groove in either reciprocatory movement, with means interposed between said shaft and sleeve adapted to guidingly support and maintain said elements in operative relation.

3. In a motor engine, the combination with a reciprocating rod, a shaft, guiding devices for said rod and shaft, and power-transmitting devices, of connecting actuating mechanism between said shaft and the powertransmitting devices, consisting of an alining and rotatably-supportedtubular shaft, mounted sleeve-like on said shaft, and formed in two sections each with inclined and reversely-set contiguous spiral faces, said sections bein united peripherally in spaced relation to orm between them an inwardly tapering double spiral cam-groove, an adjustable tapering cam-stud carried on the periphery of said shaft, said cam-stud adapted to operatively engage the inclined walls of said cam-groove of the tubular shaft.

\ 4. In a motor engine, the combination with a reciprocating rod, guiding devices to restrain it om rotation, a stationary frame power-transmitting devices rotatably-snpported thereon, of mechanism interposed between the rod and the power transmitting devices operating to directly impart rotary motion to the latter from the reciprocating motion of the former, said mechanism consisting of a rotatably mounted tubular shaft formed in two sections which are united peripherally in spaced relation and with their contiguous faces so shaped as to form between them a reversely-set double spiralcam groove, having inwardly-inclined walls, a reciprocating cam-shaft on which said tubular shaft is journaled, a cam-stud on the periphery of said shaft, and a rotatable tapering collar co-acting therewith, said collar eing adapted to operatively engage the tapering cam-groove in said sectional tubular shaft.

In testimony whereof, I have hereunto affixed my signature this first day of June A. D. 1907.

' FRANK H. MILLS. Witnesses:

A. M. 'BIDDLE,

JAS. O. WOBENSMITH. 

